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    explorer7377's Avatar
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    Default New CEM60 owner trying to figure out wiring



    Hello all! Just joined the CEM60 club as a defector from the G11. The mount gets here Monday but I am mapping out my wiring now. So I have several questions.
    1. The G11 used an ethernet connection via ASCOM. Understanding the CEM60 does not have ethernet, I would use a USB (from computer) to RS232 converter to RS232 on side of mount for control, using ASCOM/commander. Correct?
    2. On the old set up, I only ran a USB from guide camera to USB 3.0 hub connected to computer. Guide camera (through PHD2) talked to computer and computer talked to the mount over ethernet for guiding commands. Using the above scenario, will this still work through the RS232 port or do I need to actually use the ST-4 port from guide camera to mount?
    3. My main camera is USB 3.0. Though the DEC hub is 2.0, I do not see it actually being effective running the main camera, focuser and guide camera through the hub and back to a 2.0 cable to the computer. Seems it would get jumbled up. Has anyone experienced this or is everyone just using powered 3.0 hubs and omitting the DEC hub entirely?
    4. I plan on using the 2 DC outputs on the DEC. (1) for camera and (1) for dew heaters. I will be powering the input from the DC input by the scope via a Rigrunner 12v set up. My concern is that it is a single input from the Rigrunner (under a 3amp fuse). I do see a possible concern between the camera maintaining clean power while the dew heaters are running. Has anyone had any issues with this?
    5. The PORT on the mount. Other than dome control or iOptron device....what else can it be used for?

    Thanks to all for your help! Cannot wait to get this puppy rocking the sky!

    CJ

  2. #2
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    Default Re: New CEM60 owner trying to figure out wiring

    Welcome to the forums CJ
    Refractors: Antares 105 f/15, Celestron 150 f/8, Stellarvue NHNG 80 f/6.9, TAL 100RS f/10, TS 102 f/11, UR 70 f/10, Vixen SD115s f/7.7
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  3. #3
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    Default Re: New CEM60 owner trying to figure out wiring

    Hey CJ -

    I just got my CEM60 2 weeks ago so I don't have much under the stars experience (due to the astro toy law that states if you get anything new, there will be nothing but clouds for a month) but quite a bit under the garage testing. Here is what I can tell you...

    1) Yes, USB to RS232 converter to J11 plug in the RS232 port of the mount. I am controlling the mount using Stellarium through ASCOM/Commander.
    2) I am running the guide camera output directly to the GUIDE input of the mount. Mind you this hasn't actually been tested but it is how I ran it on my previous mount and everything connects in PHD2
    3) I have a computer physically attached to my scopes on the cross bar for a side by side config that I wirelessly remote into for control. I have my sBig camera attached to a port on the computer itself, though in a previous incantation I did have it running through a USB hub. I am not using the DEC hub for anything at this time.
    4) I setup a Rigrunner attached to the cross bar too and don't run dew heaters at this time so I can't tell you anything about the power quality outside of the notion that I thought the dew heaters were made with pretty clean supply regulation that shouldn't affect the camera power as this would be an obvious problem with using both. Can't say for sure.
    5) AFAIK, the PORT port is just there for ballast to equal out the weight distribution on both sides of the mount ;-}

    Good luck, hope this somewhat answers your questions
    brad
    Explore Scientific 208mm f/3.9 Newt, Explore Scientific (ES)127mm & Vixen Sf80ED refractors: ES 9mm & 14mm 100deg EP's, TeleVue Nagler 26mm EP, TeleVue 2.x
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    's (2"&1¼"), Plossels:
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  4. #4
    KathyNS's Avatar
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    Default Re: New CEM60 owner trying to figure out wiring

    1. Correct. My computer has an actual RS232 port, so I run straight RS-232 all the way from the computer to the mount. WHat you describe is more common nowadays.

    2. The setup you described is the preferred configuration. Do not use the ST-4 cable.

    3. Don't plug a USB 3 camera into a USB 2 port. That is asking for trouble. I use the Dec hub, but all my gear is USB 2. I have the Dec hub connected to a powered hub on the pier, so I don't have to worry about the electrical load on the computer.

    4. So the Rigrunner supplies the Dec DC outputs, which supply the camera and the dew heater? You are going to have to manage your loads carefully. That sounds like more than a 3A load. Are you running the dew heater at full 12v, or do you have a PWM controller on the OTA?

    5. The PORT port is just there to catch dust.

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    DSO AP: Orion 200mm f/4 Newtonian Astrograph; ATIK 383L+; EFW2 filter wheel; Astrodon Ha,LRGB filters; KWIQ/QHY5 guide scope; Planetary AP: Celestron C-11; ZWO ASI120MC; Portable: Celestron C-8 on HEQ5 pro; C-90 on wedge; 20x80 binos; Etc: Canon 350D; Various EPs, etc. Obs: 8' Exploradome; iOptron CEM60 (pier);
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